feat: Add recent published section and filter self-interactions

- Add "Publicaciones Recientes" section to dashboard showing published posts
- Filter out self-generated interactions in X API (thread auto-replies)
- Improve username resolution for X interactions using user expansions
- Pass recent_published data to dashboard template

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

app/api/routes/dashboard.py

@@ -73,13 +73,19 @@ async def dashboard_home(request: Request, db: Session = Depends(get_db)):
         Interaction.responded == False
     ).order_by(Interaction.interaction_at.desc()).limit(5).all()
 
+    # Posts publicados recientemente
+    recent_published = db.query(Post).filter(
+        Post.status == "published"
+    ).order_by(Post.published_at.desc()).limit(5).all()
+
     return templates.TemplateResponse("index.html", {
         "request": request,
         "user": user.to_dict(),
         "stats": stats,
         "pending_posts": [p.to_dict() for p in pending_posts],
         "scheduled_posts": [p.to_dict() for p in scheduled_posts],
-        "recent_interactions": [i.to_dict() for i in recent_interactions]
+        "recent_interactions": [i.to_dict() for i in recent_interactions],
+        "recent_published": [p.to_dict() for p in recent_published]
     })